THE EVALUATION OF THE AEDES ALBOPICTUS ENTOMOLOGICAL INDEX BASED ON THE TOPOGRAPHY TO COMPUTE THE ESSENTIAL REQUIREMENTS FOR DENGUE TRANSMISSION SURVEILLANCE IN NAKHON SI THAMMARAT, THAILAND
Keywords:Aedes, dengue, entomological index, surveillance, sweep net, sticky pad
An entomological index is widely used for determining dengue transmission and mosquito populations. In this study, we determined the association between Aedes albopictus mosquito counts in three areas with different topographical features from six districts in Nakhon Si Thammarat and infected patients reported by the Ministry of Public Health’s Department of Disease Control, using entomological indices, such as the sticky pad index and the sweep net index. The sampling region was selected from the top six districts of the province based on the number of reported dengue cases per 100,000 people. The regions were Khanom, Mueang, Pak Phanang, Phrom Khiri, Thung Song, and Thung Yai. They were divided into three categories of geographical features, including city, beach, and mountain. The mosquitos were collected by walking in a star form inside a 5 m diameter circle. The mosquitoes were separated into groups based on their species, and the percentile of the index was computed. We found that the number of mosquitoes was the highest in Pak Phanang and lowest in Khanom. The two indices and the number of A. albopictus collected from the six sampling locations were not significantly different (t = 1.31, p > 0.05). The coastline region had the highest number of mosquitoes and was substantially different from the other two regions (cosmopolitan and mountain) (F = 4.30; p < 0.05). By performing Pearson’s correlation analysis, we found a negative correlation between dengue cases and the entomological index (r = –0.472; N = 36). Similarly, the number of patients showed a negative correlation with relative humidity (r = –0.355) but a positive correlation with temperature (r = 0.064). The epidemic pattern shifted throughout the year, and the number of cases then increased 2–4 weeks after the insect was found.
Tandina F, Doumbo O, Yaro AS, Traoré SF, Parola P, Robert V. Mosquitoes (Diptera: Culicidae) and mosquito-borne diseases in Mali, West Africa. Parasit Vectors 2018; 11(1): 467, doi: 10.1186/s13071–018–3045–8.
Ferreira-de-Lima VH, Lima-Camara TN. Natural vertical transmission of dengue virus in Aedes aegypti and Aedes albopictus: a systematic review.” Parasit Vectors 2018; 11(1): 77, doi: 10.1186/s13071–018–2643–9.
Marques-Toledo CA, Bendati MM, Codeço C T, Teixeira MM. Probability of dengue transmission and propagation in a non-endemic temperate area: conceptual model and decision risk levels for early alert, prevention and control. Parasit Vectors 2019; 12(1): 38, doi: 10.1186/s13071–018–3280-z.
Mint Mohamed Lemine A, et al. Mosquitoes (Diptera: Culicidae) in Mauritania: a review of their biodiversity, distribution and medical importance. Parasit Vectors 2017; 10(1):35, doi: 10.1186/s13071–017–1978-y.
Attaullah M, et al. Diversity, distribution and relative abundance of the mosquito fauna (Diptera: Culicidae) of Malakand and Dir Lower, Pakistan. Braz. J. Biol. 2022; 83: p. e247374, doi: 10.1590/1519–6984.247374.
Nagao Y, Tawatsin A, Thammapalo S, Thavara U. Geographical gradient of mean age of dengue haemorrhagic fever patients in northern Thailand. Epidemiol. Infect. 2012; 140(3):479–490, doi: 10.1017/S0950268811000653.
Tananchai C, Manguin S, Bangs MJ, Chareonviriyaphap T. Malaria Vectors and Species Complexes in Thailand: Implications for Vector Control. Trends Parasitol. 2019; 35(7): 544–558, doi: 10.1016/j.pt.2019.04.013.
Brown JA, Larson KL, Lerman SB, Cocroft A, Hall SJ. Resident Perceptions of Mosquito Problems Are More Influenced by Landscape Factors than Mosquito Abundance. Sustainability 2021; 13(20): 11533, doi: 10.3390/su132011533.
World Health Organization, Ed., WHO traditional medicine strategy. 2014–2023. Geneva: World Health Organization, 2013.
Chaiphongpachara T, Yusuk P, Laojun S, Kunphichayadecha C. Environmental Factors Associated with Mosquito Vector Larvae in a Malaria-Endemic Area in Ratchaburi Province, Thailand Sci. World J. 2018; 2018:1–8, doi: 10.1155/2018/4519094.
Rotenberry JT, Balasubramaniam P. Connecting species’ geographical distributions to environmental variables: range maps versus observed points of occurrence. Ecography 2020; 43(6):897–913, doi: 10.1111/ecog.04871.
Ombugadu A, Maikenti JI, Maro SA, et al. Survey of Mosquitoes in Students Hostels of Federal University of Lafia, Nasarawa State, Nigeria. Biomed. J. Sci. Tech. Res. 2020; 28(4): 21822–21830, doi: 10.26717/BJSTR.2020.28.004691.
Thongsripong P, Green A, Kittayapong P, Kapan D, Wilcox B, Bennett S. Mosquito Vector Diversity across Habitats in Central Thailand Endemic for Dengue and Other Arthropod-Borne Diseases. PLoS Negl. Trop. Dis.2013; 7(10): e2507, doi: 10.1371/journal.pntd.0002507.
Leta A, Megersa T. Factors Influencing Soil Erosion Management Practices in Ejersa Lafo District, West Showa Zone, Oromia, Regional State, Ethiopia. J. Appl. Sci. Environ. Manag.2021; 25(1):79–85, doi: 10.4314/jasem.v25i1.11.
Medlock J, Balenghien T, Alten B, Versteirt V, Schaffner F. Field sampling methods for mosquitoes, sandflies, biting midges and ticks. EFSA Support. Publ.2018. doi: 10.2903/sp.efsa.2018.EN-1435.
Morales-Pérez A, Nava-Aguilera E, Herna´ndez-Alvarez C, et al. Utility of entomological indices for predicting transmission of dengue virus: secondary analysis of data from the Camino Verde trial in Mexico and Nicaragua. PLoS Negl. Trop. Dis. 2020; 14(10):e0008768, doi: 10.1371/journal.pntd.0008768.
Tangena J-A A, Thammavong P, Hiscox A, Lindsay SW, Brey PT. The Human-Baited Double Net Trap: An Alternative to Human Landing Catches for Collecting Outdoor Biting Mosquitoes in Lao PDR. PLOS ONE 2015; 10(9): e0138735, doi: 10.1371/journal.pone.0138735.
Chaiphongpachara T, Bunyuen P, Chansukh KK. Development of a More Effective Mosquito Trapping Box for Vector Control. Sci. World J.2018; 2018:1–8, doi: 10.1155/2018/6241703.
Martini M, Armen Z, Nissa K, Retno H, Sri Y, Atik M, Susiana P. Entomological Status Based on Vector Density Index and Transovarial Infection on Aedes Sp. Mosquito in Meteseh Village, Semarang City. E3S Web of Conferences 202, 12016. 2020. https://doi.org/10.1051/e3sconf/202020212016.
Haddawy P, Wettayakorn P, Nonthaleerak B, Su Yin M, Wiratsudakul A, Scho¨ning J, et al. Large scale detailed mapping of dengue vector breeding sites using street view images. PLoS Negl Trop Dis 2019; 13(7): e0007555. https://doi. org/10.1371/journal.pntd.0007555
Möhlmann TWR, Wennergren U, Tälle M, et al. Community analysis of the abundance and diversity of mosquito species (Diptera: Culicidae) in three European countries at different latitudes. Parasit Vectors. 2017; 23:10(1):510, doi: 10.1186/s13071–017–2481–1.
World Health Organization, Ending the neglect to attain the sustainable development goals: a global strategy on water, sanitation and hygiene to combat neglected tropical diseases, 2021–2030. Geneva: World Health Organization, 2021. Accessed: Jan. 10, 2022. [Online]. Available: https://apps.who.int/iris/handle/10665/340240
Department of Disease Control. Forecast report Dengue fever in 2021. Department of Disease Control, Ministry of Health. 51 pp.
24. Bureau of Epidemiology, Department of Disease Control, Ministry of Public Health. Disease report in the surveillance system 506 (Dengue Fever). 11 July, 2017
Nakhon Si Thammarat Provincial Public Health Office. Annual Report 2020: Dengue Situation Report 2020; Nakhon Si Thammarat (in Thai).
European Centre for Disease Prevention and Control; European Food Safety Authority. Field sampling methods for mosquitoes, sandflies, biting midges and ticks – VectorNet project 2014–2018. Stockholm and Parma: ECDC and EFSA; 2018.
Garjito TA, Susanti L, Mujiyono M, Prihatin MT, Susilo D, Nugroho SS, Mujiyanto M, Wigati RA, Satoto TBT, Manguin S, Gavotte L and Frutos R (2021) Assessment of Mosquito Collection Methods for Dengue Surveillance. Front. Med. 8:685926. doi: 10.3389/fmed.2021.685926.
Upton MS, Mantle BL. Methods for collecting, preserving and studying insects and other terrestrial arthropods. THE AUSTRALIAN ENTOMOLOGICAL SOCIETY, 2010:90.
Häuser CL, Riede K. Field methods for inventorying insects. in Descriptive Taxonomy, Watson M F, Lyal C, Pendry C, Eds. Cambridge: Cambridge University Press. 2015:190–213. doi: 10.1017/CBO9781139028004.021.
Gatt P, Deeming JC, Schaffner F. First records of Aedes (Stegomyia) albopictus (Skuse) (Diptera: Culicidae) in Malta. Eu Mosq Bull. 2009;27 56–64.
Medlock JM, Avenell D, Barrass I, Leach S. Analysis of the potential for survival and seasonal activity of Aedes albopictus (Diptera: Culicidae) in the United Kingdom. J Vector Ecol. 2006;31(2):292–304.
Gorsich EE, Beechler BR, van Bodegom PM, et al. A comparative assessment of adult mosquito trapping methods to estimate spatial patterns of abundance and community composition in southern Africa. Parasit. Vectors 2019; 12(1)462, doi: 10.1186/s13071–019–3733-z.
Kenea O, Balkew M, Tekie H, et al. Comparison of two adult mosquito sampling methods with human landing catches in south-central Ethiopia. Malar. J. 2017; 16(1):30, doi: 10.1186/s12936–016–1668–9.
Degefa T, Yewhalaw D, Zhou G, Atieli H, Githeko AK, Yan G. Evaluation of human-baited double net trap and human-odour-baited CDC light trap for outdoor host-seeking malaria vector surveillance in Kenya and Ethiopia. Malar. J. 2020; 19(1):174, doi: 10.1186/s12936–020–03244–2.
Connelly CR, Gerding JA, Jennings SM, et al. Continuation of Mosquito Surveillance and Control During Public Health Emergencies and Natural Disasters. MMWR Morb. Mortal. Wkly. Rep. 2020; 69(28):938–940, doi: 10.15585/mmwr.mm6928a6.
Romeo-Aznar V, Paul R, Telle O, Pascual M. Mosquito-borne transmission in urban landscapes: the missing link between vector abundance and human density. Proc. R. Soc. B Biol. Sci.2018; 285(1884): p. 20180826, doi: 10.1098/rspb.2018.0826.
Almeida L, Duprez M, Privat Y, Vauchelet N. Mosquito population control strategies for fighting against arboviruses. Math. Biosci. Eng. 2019; 16(6):6274–6297, doi: 10.3934/mbe.2019313.
Goff GL, Damiens D, Ruttee A-H, et al. Field evaluation of seasonal trends in relative population sizes and dispersal pattern of Aedes albopictus males in support of the design of a sterile male release strategy. Parasit. Vectors 2019; 12(1):81, doi: 10.1186/s13071–019–3329–7.
Ong J, Liu X, Rajarethinam J, Yap G, Ho D, Ng LC. A novel entomological index, Aedes aegypti Breeding Percentage, reveals the geographical spread of the dengue vector in Singapore and serves as a spatial risk indicator for dengue. Parasites & Vectors 2019; 12:17.
Facchinelli L, Valeriol L, Pombi M, Reiter P, Costantini C, Dellatorre A. Development of a novel sticky trap for container breeding mosquitoes and evaluation of its sampling properties to monitor urban populations of Aedes albopictus. Medical and Veterinary Entomology. 2007; 21:183–195.
Bazin M, Williams CR. Mosquito traps for urban surveillance: collection efficacy and potential for use by citizen scientists. Journal of Vector Ecology 2018; 43(1): 98–103.
Codeço CT, Lima AWS, Araújo SC, Lima JBP, Maciel-de-Freitas R, Honório NA, et al. Surveillance of Aedes aegypti: Comparison of House Index with Four Alternative Traps. PLoS Negl Trop Dis 2015; 9(2): e0003475. doi:10.1371/journal.pntd.0003475.
Effler PV, Pang L, Kitsutani P, Vorndam V, Nakata M, Ayers T, et al. Dengue outbreaks in Hawai‘i after WWII – A Review of Public Health Response and Scientific Literature. Hawai‘i journal of medicine and public health 2005; 11(5):742–9.
Ramchurn SK, Moheeput K, Goorah SS. An analysis of a short-lived outbreak of dengue fever in Mauritius. Euro Surveill. 2009;14(34):pii = 19314.
Faridah L, Fauziah N, Agustian D, Jaya IGNM, Putra RE, Ekawardhani S, Hidayath N, Djati ID, Carvajal TM, Mayasari W, Rinawan FR, Watanabe K. Temporal Correlation Between Urban Microclimate, Vector Mosquito Abundance, and Dengue Cases. Journal of Medical Entomology, 2022; 59(3):1008–1018. https://doi.org/10.1093/jme/tjac005
Fatima Syeda Hira1, Ali Asad1, Zaidi Farrah2, Rasheed Syed Basit2, Fatima Mehreen3 and Khisroon Muhammad. Patterns of occurrence of dengue and chikungunya, and spatial distribution of mosquito vector Aedes albopictus in Swabi district, Pakistan. Tropical Medicine and International Health.